SIRIUS 3RT1325-1AV60 — 4-pole power contactor, Size S0
Its AC-2 motor-switching rating is 7.5 kW at 400 V — that is the figure that governs real motor duty, not the higher AC-1 resistive current. For a 4-pole contactor this frame size, the AC-2 rating tells you the contactor is designed for slip-ring motor starting, where the inrush and breaking duty are heavier than a standard squirrel-cage start. The 61 mm width and 85 mm height keep it within the S0 footprint — plan side clearance of 6 mm for heat dissipation between units.
Auxiliary contact ratings and coordination
The auxiliary contact block (integrated in this variant) is rated across common control voltages: 10 A at 24 V, 6 A at 230 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, and 3 A at 400 V. These are the make/break capacities for the control circuit — useful when selecting the contactor for a PLC output or a relay interposing. For short-circuit protection, type 1 coordination calls for a 63 A gL/gG fuse; type 2 coordination (where the contactor must remain usable after a fault) requires a 25 A gL/gG fuse.
No official successor has been issued for this code, so the 3RT1325-1AV60 remains the direct fit for any panel built around the S0 frame with 4-pole, 4 NO main contacts and screw terminals.
Wiring and terminal data
Main circuit terminals accept solid or stranded conductors: 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or max 2x 10 mm². Auxiliary terminals accept 2x (0.5 to 1.5 mm²) solid, 2x (0.75 to 2.5 mm²) finely stranded with ferrule, or max 2x (0.75 to 4 mm²). AWG equivalents for main contacts are 2x (20 to 16), 2x (18 to 14), 1x 12; for auxiliary contacts the same AWG ranges apply.